第33卷第1期Vol.33No.1水 资 源 保 护WATER RESOURCES PROTECTION 2017年1月Jan.2017DOI :10.3880/j.issn.10046933.2017.01.014
基金项目:国家自然科学基金(41302204);中央级公益性科研院所基本科研业务费项目(CKSF2014029/SH)作者简介:董磊(1987 ),男,工程师,硕士,主要从事水环境治理三E-mail:dongleigushi@https://www.doczj.com/doc/7c10145731.html, 改性凹凸棒土/纳米铁复合材料去除地下水NO -3-N 的研究
董 磊1,2,龚 磊3,林 莉1,2,冯 雪1,2,李青云1,2
(1.长江水利委员会长江科学院流域水环境研究所,湖北武汉 430010;
2.长江水利委员会长江科学院流域水资源与生态环境科学湖北省重点实验室,湖北武汉 430010;
3.长江水利委员会长江科学院党群办公室,湖北武汉 430010)摘要:采用液相还原法制备改性凹凸棒土/纳米铁复合材料(简称复合材料),考察了该复合材料的
稳定性及其作用下 三氮 (NO -3-N 二NH +4-N 二NO -2-N )的变化情况,阐明了地下水环境因素(DO 二温度二光照)对复合材料去除NO -3-N 的影响三模拟地下水环境时,3种材料去除NO -3-N 的反应活性顺序为:复合材料>纳米铁>改性凹凸棒土,且复合材料作用下NH +4-N 的转化率低,几乎无NO -2-N 生成三DO 二温度对复合材料去除地下水NO -3-N 的影响较大;而光照和黑暗环境下,地下水中NO -3-N 的去除率及NH +4-N 二NO -2-N 的生成量均无明显差异三研究成果旨在为NO -3-N 污染地下水工程修复提供理论依据和技术支撑三
关键词:地下水;NO -3-N ;改性凹凸棒土/纳米铁复合材料;环境因素中图分类号:X523 文献标志码:A 文章编号:10046933(2017)01006708
Study of removal of nitrate nitrogen from groundwater using modified attapulgite-Fe nano composite material
DONG Lei 1,2,GONG Lei 3,LIN Li 1,2,FENG Xue 1,2,LI Qingyun 1,2(1.Basin Water Environmental Research Department ,Changjiang River Scientific Research Institute ,Changjiang Water Resources Commission ,Wuhan 430010,China ;2.Key Lab of Basin Water Resource and Eco-Environmental Science in Hubei Province ,Changjiang River Scientific Research Institute ,Changjiang Water Resources Commission ,Wuhan 430010,China ;3.Party and Mass Line Office ,Changjiang River Scientific Research Institute ,Changjiang Water Resources Commission ,Wuhan 430010,China )
Abstract :In this study,we synthesized modified attapulgite-Fe nano composite material (A-NZVI)using the liquid-phase reduction method,and investigated the stability of A-NZVI and changes of three kinds of nitrogen (NO 3--N,NH 4+-N,and NO 2--N )in the reaction process.We also analyzed the effects of groundwater environmental factors (dissolved oxygen,temperature,and light)on the removal of NO 3--N with A-NZVI.In the simulation of groundwater environment,the three kinds of materials were ranked in the following descending order according to their reactivity in removing NO 3--N:A-NZVI,nanoscale zero-valent iron,and modified attapulgite.The conversion rate of NH 4+-N was low,with nearly no NO 2--N generated,when using A-NZVI.Dissolved oxygen and temperature had significant influence on the removal of NO 3--N from groundwater with A-NZVI.When in the light and dark environment,the removal rate of NO 3--N and the amounts of generated NH 4+-N and NO 2--N had no significant difference.The findings of the study provided a theoretical basis and technical support for restoration projects for groundwater with NO 3--N pollution.Key words :groundwater;nitrate nitrogen;modified attapulgite-Fe nano composite material;environmental factor 四76四万方数据